Apple Cookies

Name: Apple Cookies
Prep time: 15 min
Total time: 15 min
Cuisine: European
Ingredients: 2 sticks unsalted butter; 4 granny smith apples (around 8-oz. each), peeled, grated on large holes of box grater; 1 1/2 c. granulated sugar; 2 tsp. vanilla extract; 1 1/2 (200 g.) all-purpose flour; 1 tsp. baking soda; 2 c. (160 g.) Old-Fashioned rolled oats; 2 tsp. cinnamon; 1/2 tsp. nutmeg; 1/4 tsp. allspice; 1/4 tsp. cardamom; 1/2 tsp. kosher salt; 1 c. powdered sugar; Pinch of salt; 2 to 3 Tbsp. of milk